Question: Bill Gates is the chairperson for what private foundation located in the United States?
Paraphrase: Bill Doors is the chairperson for what private establishment found within the Joined together States?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P488 wd:Q5284 . ?sbj wdt:P31 wd:Q7246202 } 
Answer: Bill & Melinda Gates Foundation